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采用平板夹具测试高强度、特高强度钢丝时,由于试样在夹具内有滑移和损伤,则产生应力集中,致使试样断在夹具内。这样得到的结果偏低。根据标准规定,试验无效,需重新进行测试。为解决夹口断现象,我们把夹具改进为圆板式组合夹具(图1)。
The use of flat-panel fixture test high-strength, extra-high strength steel wire, the specimen in the fixture with slippage and damage, resulting in stress concentration, resulting in the specimen broken in the fixture. The result is low. According to the standard, the test is invalid and needs to be retested. In order to solve the phenomenon of pinch-off, we improved the fixture into a disc-type combination fixture (Figure 1).